Main Features: *Ergonomic design,easy operation and anti-strain-injury * Innovative 256 user ID codes,prevent RF interference *Radio frequency 27MHz technology,signal transferable in 360 degree full angle 800dpi optical sensor　 *Operating range:3 meters valid operating distance * Auto matically power-saving sleeping installation *Upt to 12 inches/S moving speed *Rapid USB recharging functionality saves battery replacement *Elaborate designed recharging circuit,intellectual alerting circuit design reminds users to recharge power on time *Ready for metallic color and rubber coating body *Sheeny surface or Rubber coated on upper and bottom case *Mouse size:116*56*34mm *Connect:USB or USB+PS2 combo System Requirements: *High-precision optical trackball *Never needs cleaning *LED roller shines the status of trackball movements. *Supports Windows 98/2000/Me/NT/XP/2003 Mac OS 8.6 or higher *With the optical technolog the motion can be detected on most surfaces ,including wood plastic ,paint,etc. Packing Details: * Deluxe Gift box:245(L)X186(W)X60(H)mm N.W.: 1.65 kg *Carton:600(L)X490(W)X380(H)mm G.W.: 5.9 kg *40pcs/CTN *Qty per 20' 13000, Qty per 40' 26000, * Qty per 40'QH 29000